55222272 has 168 divisors, whose sum is σ = 184013856. Its totient is φ = 15630336.

The previous prime is 55222247. The next prime is 55222291. The reversal of 55222272 is 27222255.

It is a tau number, because it is divible by the number of its divisors (168).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 516043 + ... + 516149.

Almost surely, 2^55222272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55222272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92006928).

55222272 is an abundant number, since it is smaller than the sum of its proper divisors (128791584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55222272 is a wasteful number, since it uses less digits than its factorization.

55222272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 119 counting only the distinct ones).

The product of its digits is 5600, while the sum is 27.

The square root of 55222272 is about 7431.1689524596. The cubic root of 55222272 is about 380.8068543831.

The spelling of 55222272 in words is "fifty-five million, two hundred twenty-two thousand, two hundred seventy-two".